books.google.co.uk - Cometography is the most complete and comprehensive collection of data on comets available. It comes in four self-contained sequential volumes and this, the first, covers ancient times through to the end of the eighteenth century. Cometography uses the most reliable orbits known to determine all the...https://books.google.co.uk/books/about/Cometography_Volume_1_Ancient_1799.html?id=Umxbb68tmZMC&utm_source=gb-gplus-shareCometography: Volume 1, Ancient-1799